The phrase "based on true events" always sends a tingle down our spines. In a new trailer for horror flick "The Quiet Ones," those events supposedly take place in 1974 when a team from Oxford University tries to get photographic proof that ghosts exist.

"Mad Men" star Jared Harris plays the professor who leads a group of students in testing his hypothesis that poltergeists spring from negative human energy. But of course, the experiment takes a dark turn and creepy, frightening things start happening to the students.

"The Quiet Ones" also stars Sam Claflin, Olivia Cooke, and Erin Richards, and haunts theaters on April 11.
The Quiet Ones Movie Poster
The Quiet Ones
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An unorthodox college professor leads his best students off the grid to perform a dangerous experiment... Read More